Composite insulator.



PATENTED DEC. 5, 1905.

L. STEINBERGER. COMPOSITE INSULATOR.

APPLICATION FILED NOV. 26.1904.

f i Z IVVE/V T01? loazls-Jiezhezyar ATTORNEYS f LOUIS STEINBERGER, OF NEWV YORK, N. Y.

COMPOSITE INSULATOR.

Specification of Letters Patent.

Patented Dec. 5, 1905.

Application filed November 26, 190 1. Serial No. 234,386.

To all whom it may concern;

Be it known that I, LOUIS STEINBERGER, a citizen of the United States, and a resident of the city of New York, borough of Brooklyn, in the county of Kings and State of New York, have invented anew and Improved Composite Insulator, of which the following is a full, clear, and exact description.

My invention relates to insulators and admits of general use, but applies more particularly to a type of composite insulator in which there are a plurality of hoods detachably connected together.

'My invention further relates to means for thorough insulation of the parts supporting these hoods and of the wires or cables to be supported by the insulator.

Among the several objects of my invention are the following:

First. In order to meet different conditions and requirements of service, hoods of various sizes may be employed interchangeably.

Second. The hoods being separable, in case of breakage or injury to any member the same may be readily replaced with a perfect member and the insulator as a unit again attains its full power.

Third. For transportation purposes it is of the utmost importance to be enabled to stack or nest such goods, as thereby both safety and low cost of transportation are secured.

Fourth. The insulator being separable, various combinations may be effected. For instance, the entire insulator may be made of electrose, which is a well-known insulating material for high-potential currents, or any other suitable material, or one of the hoods may be made of electrose and the others of any suitable material.

Fifth. The member of yieldable material disposed between the hoods forms a water and moisture proof packing, thereby preventing creeping or leakage of the current to the pin or support and at the same time provides a cushion for the hoods.

Reference is to be had to the accompanying drawing, forming a part of this specification, in which the figure shows a vertical cross-section through one form of insulator embodying my invention.

Mounted upon a cross-bar 1 is an insulatorpin 2, provided at its bottom with a shoulder 3 and with a stud 4, which passes through a hole 5 in the cross-bar 1 and is secured in any desired manner. The upper end of the pin2 is provided with a head 6, having a frusto-conical portion 7, a shoulder 8, and a threaded or screw portion 9. The upper hood 10 is of insulating material and is provided with a head 11, provided with a diametrical slot 12 and with an annular slot 13, the conformity of these slots being suitable for enabling the insulator to support the cables and wires. The hood 10 is provided internally with a ring 14 integral therewith and tapers off to a comparatively thin rounded edge 15. The hood is further provided with a cylindrical portion 16 integral therewith and threaded both internally and externally, as shown. The hood 17 is of substantiall y frusto-conical form, its upper end being threaded internally, so that it may be screwed upon the threaded cylindrical portion 16. Disposed between theupper and lower hoods is a washer 18, of soft rubber, this washer being inserted for the double purpose of increasing the resilience of the hoods relatively to each other when screwed together tightly and also of improving the insulating properties of the two hoods when secured tightly together. The washer 18 is compressed when the upper end of the hood 17 is forced upwardly to its extreme limit. The upper end of the hood 17 is inserted in an annular slot formed by the space between the ring 1 1 and the hoods 10 and 17 is entirely independent of the action of the insulator-pin 2. The result is that the two hoods may be screwed together and sold as an article of manufacture or may be sold separately. The hoods may be mounted one at a time or may be connected together as a composite insulator, which as a unit may be screwed upon the threaded stem 9. The hood 10 is comparatively fiat, whereas the hood 17 is comparatively oblong and in the extent of its taper from one end to the other almost approximates a cylinder.

I do not limit myself to an insulator constructed exactly as shown nor to the exact form of either of the separate members shown. Neither do I limit myself to use in every instance a resilient member disposed between the hoods nor to the use of threaded portions, as shown in the drawing. I do not limit myself to any particular combinations of these parts nor to the use of any prescribed materials. I prefer, however, to employ the insulating material known in the art as electrose.

It will be evident to those skilled in the art that certain variations and modifications may be employed without departing from the scope or spirit of my invention.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. Acompositeinsulator,comprisingahood provided with a portion threaded externally, and also provided with a ring spaced apart from said portion so as to leave a slot therebetween, and a hood threaded internally so as to engage said portion and provided with an annular portion for entering said slot.

2. A compositeinsulator, comprisingahood provided with a depending portion and with a ring disposed adjacentto said depending portion and encircling the same, another hood provided with a portion extending intermediate of said depending portion and said ring, and a member disposed intermediate of said depending portion and said ring and engaging said last-mentioned hood.

8. In a device of the character described, the combination of a hood of insulating material provided with a portion integral therewith, said portion being threaded externally, another hood threaded internally and mounted upon said portion, said last-mentioned hood being open at both ends except for its engagementwith said portion, and depending as a skirt from said portion.

4:. In adevice of the character described, the combination of a hood of insulating material provided with a portion integral therewith, said portion being threaded internally for engaging the threaded stem and also threaded externally, a hood open at both ends and threaded internally so as to encircle said portion and to depend as a skirt therefrom, and an insulator-pin provided with a stem extending into said portion and provided with a shoulder engaging said portion.

5. A composite insulator, comprising a plurality of hoods, one of said hoods being provided with threads and with an annular groove, compressible material within said groove, and another hood provided with threads, and also provided with a portion extending within said groove and engaging said compressible materia 6. A composite insulator, comprisinga hood provided with a cylindrical portion and with a thread, an insulator-pin provided with a portion having a thread for engaging said thread of said cylindrical portion, said insulator-pin being further provided with a shoulder for engaging said cylindrical portion, and a hood open at both ends and provided with a portion fitting upon said cylindrical portion of said first-mentioned hood and supported thereby.

7 Acomposite insulator, comprisinga hood provided with a portion having a thread, and also provided with a ring spaced apart from said portion so as to leave a slot therebetween, and another hood provided with a thread engaging said thread of said first-mentioned hood, and further provided with an annular portion for entering said slot.

8. In a device of the character described, the combination of a hood of insulating material provided with a threaded portion integral therewith, and another hood provided with a threaded portion for engaging said threaded portion of said first-mentioned hood and being open at both ends except for its engagement with said threaded portion.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

LOUIS STEINBERGER.

Witnesses:

WALTON HARRISON, EVERARD BOLTON MARsHALL. 

